高效饱和红光聚电解质的发光及电子注入特性研究  

Study of electroluminescence and electron injection on novel red polyelectrolytes copolymer

作　　者：侯林涛[1] 黄飞[1] 彭俊彪[1] 曹镛[1] 

机构地区：[1]华南理工大学高分子光电材料与器件研究所

出　　处：《物理学报》2007年第10期6104-6108,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50573024);国家重点基础研究发展计划(973)项目(批准号:2002CB613405);教育部重点基金(批准号:104208);暨南大学博士启动基金(批准号:51207037)资助的课题~~

摘　　要：以新型的环境友好的水/醇溶性胺基化或者季铵盐化的芴和含硫窄带隙共聚物4,7-二噻吩-2-基-2,1,3-苯并噻二唑的共轭聚电解质为发光层,以高功函数金为电极,制备了一系列高效饱和红色单层发光二极管.对PFN-DBT10,在38.7mA/cm2下外量子效率达到0.42%,色坐标位于(0.67,0.33).这类聚电解质解决了发光器件层间的互溶问题,以它和高功函数金组成双层复合阴极,制成了高效三基色双层发光二极管.通过单层和双层器件结构系统地研究了这类新型聚电解质的发光特性和电子注入特性,器件效率的提高与这类聚电解质和高功函数金电极界面相互作用有关.Single-layer polymer light-emitting diodes with high work function gold cathode were fabricated using a series of novel conjugated polyelectrolytes and their neutral precursors： aminoalkyl-substituted polyfluorenes with different 4,7-di-2-thienyl-2,1, 3-benzothiadiazole contents. At the current density of 38.7 mA/cm^2 , the external efficiency reaches 0.42% with the Commission Internationale de I＇ Eclairage coordinates x=0.67 and y =0.33 for PFN-DBT10. It has been shown that these polymers also can be used as electron injection layer in double-layer devices with high work function gold cathode, which favors the manufacture of solution processing multilayer devices. Based on single-layer and double-layer device structures, it was found that the improvement of device performance is attributed to the interface effect between gold cathode and polyelectrolytes layer.

关 键 词：聚电解质 发光二极管 电子注入 

分 类 号：O482.31[理学—固体物理]